This is a Mizumoto-yaki (water-quenched) Mio-oroshi knife crafted by two master craftsmen: the renowned master craftsman Masakuni Genkai (Yukio Mukai) and Genpakuho (Minoru Hakui), who was said to be the best sharpener in Sakai. It's a rare and valuable knife, as it will never be made again. It's unused, as using it might make the water pattern disappear. I've heard the steel is Shiro-ichi-ko (white steel No. 1), but there's no confirmation. From the looks of it, it seems suitable for slicing fish and sashimi, but the thin blade edge might chip, so it's probably not suitable for filleting. Blade Length: Approximately 268mm (from tip to machi) Approximately 250mm (from tip to heel) Blade Width: Approximately 46mm (around the heel) Blade Thickness: Approximately 6mm (at the heel, spine side) Total Length: Approximately 429mm Weight: 311g Handle: Black buffalo horn octagonal magnolia handle I hope it goes to someone who will cherish it.